POST UTME BOWEN UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 2
A 5-year-old child has a body mass of 20 kg and a surface area of 0.5 m^2. If the child's basal metabolic rate is 100 W, what is the child's rate of heat loss?
A. 50 W
B. 75 W
C. 100 W
D. 125 W
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.36
B. 0.64
C. 0.16
D. 0.84
Question 4
A 1.5 L solution contains 0.5 M glu\cose. If 0.5 L of this solution is removed, what is the new concentration of glu\cose?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 5
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 6
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is true about the \endoplasmic reticulum?
A. The \endoplasmic reticulum is a type of organelle found only in plant cells.
B. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for use within the cell.
C. The \endoplasmic reticulum is a type of organelle found in both plant and animal cells.
D. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion.
Question 7
A patient is diagnosed with a viral infection that is cau\sing inflammation in their liver. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
B. The patient will require a longer duration of antiviral treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antiviral treatment.
Question 8
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol after 10 minutes?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M
Question 9
In a population of 1000 individuals, 70% are homozygous dominant for the gene controlling flower color, 20% are homozygous recessive, and 10% are heterozygous. If the population is randomly sampled, what is the probability that two individuals chosen at random will both be homozygous dominant?
A. 0.49
B. 0.49
C. 0.49
D. 0.49
Question 10
A patient is diagnosed with a fungal infection that is cau\sing a skin rash. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
B. The patient will require a longer duration of antifungal treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antifungal treatment.
Question 11
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole
Question 12
A neuron is stimulated by an action potential that travels along its axon. Which of the following is a likely consequence of this stimulation?
A. The neuron will release neurotransmitters into the synapse.
B. The neuron will experience a decrease in its excitability.
C. The neuron will experience a rapid decline in its condition.
D. The neuron will not be able to transmit signals.
Question 13
In a random sample of 1000 individuals, the mean height is 175 cm with a s\tandard deviation of 5 cm. What is the probability that a randomly selected individual has a height greater than 180 cm?
A. 0.0228
B. 0.0446
C. 0.0664
D. 0.0882
Question 14
A diagram of the human circulatory system is shown below. What is the function of the pulmonary valve?
A. To regulate blood pressure
B. To control blood flow to the lungs
C. To prevent backflow of blood
D. To pump blood to the aorta
Question 15
A cell in the G2 phase of the cell cycle has a DNA content of 8C. If the cell undergoes mitosis, what will be the DNA content of the daughter cells?
A. 4C
B. 8C
C. 16C
D. 32C

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